Wednesday, August 13, 2008

Intel Releases xHCI Draft Spec for USB 3.0 Architecture

Intel released the Extensible Host Controller Interface (xHCI) draft specification revision 0.9 in support of the USB 3.0 architecture, also known as SuperSpeed USB. The xHCI draft specification provides a standardized method for USB 3.0 host controllers to communicate with the USB 3.0 software stack.


xHCI describes the registers and data structures used to interface between system software and the hardware, and are developed to be compatible with the USB 3.0 specification being developed by the USB 3.0 Promoter Group.


Intel is making the draft spec available under RAND-Z (royalty free) licensing terms to all USB 3.0 Promoter Group and contributor companies that sign an xHCI contributor agreement.


The future of computing and consumer devices is increasingly visual and bandwidth intensive," said Phil Eisler, AMD corporate vice president and general manager of the Chipset Business Unit. "Lifestyles filled with HD media and digital audio demand quick and universal data transfer. USB 3.0 is an answer to the future bandwidth need of the PC platform. AMD believes strongly in open industry standards, and therefore is supporting a common xHCI specification."http://www.intel.comhttp://www.usb.org

  • SuperSpeed USB will be backward-compatible with earlier USB implementations. The personal USB interconnect is targeting to deliver over 10 times the speed of today's connection, or roughly 4.8 Gbps. It will also be optimized for lower power and improved protocol efficiency.

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